TLC548C, TLC548I, TLC549C, TLC549I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS067C – NOVEMBER 1983 – REVISED SEPTEMBER 1996
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Microprocessor Peripheral or Standalone
Operation
D
8-Bit Resolution A/D Converter
D
Differential Reference Input Voltages
D
Conversion Time ...17 µs Max
D
Total Access and Conversion Cycles Per
Second
– TLC548...up to 45500
– TLC549...up to 40000
D
On-Chip Software-Controllable
Sample-and-Hold Function
D
Total Unadjusted Error...±0.5 LSB Max
D
4-MHz Typical Internal System Clock
D
Wide Supply Range...3 V to 6 V
D
Low Power Consumption...15 mW Max
D
Ideal for Cost-Effective, High-Performance
Applications including Battery-Operated
Portable Instrumentation
D
Pinout and Control Signals Compatible
With the TLC540 and TLC545 8-Bit A/D
Converters and with the TLC1540 10-Bit
A/D Converter
D
CMOS Technology
description
The TLC548 and TLC549 are CMOS analog-to-digital converter (ADC) integrated circuits built around an 8-bit
switched-capacitor successive-approximation ADC. These devices are designed for serial interface with a
microprocessor or peripheral through a 3-state data output and an analog input. The TLC548 and TLC549 use
only the input/output clock (I/O CLOCK) input along with the chip select (CS
) input for data control. The
maximum I/O CLOCK input frequency of the TLC548 is 2.048 MHz, and the I/O CLOCK input frequency of the
TLC549 is specified up to 1.1 MHz.
AVAILABLE OPTIONS
PACKAGE
T
A
SMALL OUTLINE
(D)
PLASTIC DIP
(P)
0°C to 70°C
TLC548CD
TLC549CD
TLC548CP
TLC549CP
–40°C to 85°C
TLC548ID
TLC549ID
TLC548IP
TLC549IP
Copyright 1996, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
3
4
8
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6
5
REF+
ANALOG IN
REF–
GND
V
CC
I/O CLOCK
DATA OUT
CS
D OR P PACKAGE
(TOP VIEW)
